Hole saw



FIG. 1 is a perspective view of a hole saw showing my new design;

FIG. 2 is a side elevational view thereof, the broken line disclosure of a drill bit attachment is for illustrative purposes only;

FIG. 3 is a top plan view thereof;

FIG. 4 is a side elevational view taken from the left of FIG. 2;

FIG. 5 is a side elevational view taken from the right of FIG. 2;

FIG. 6 is a bottom plan view thereof;

FIG. 7 is a side elevational view opposite that shown in FIG. 2. 

The ornamental design for a hole saw, as shown and described. 